package com.lxk.concurrency.example.atomic;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicBoolean;

import com.lxk.concurrency.annoations.ThreadSafe;

@ThreadSafe
public class AtomicExample6 {

	private static AtomicBoolean isHappened = new AtomicBoolean(false);

	// 请求总数
	public static int clientTotal = 5000;

	// 同时并发执行的线程数
	public static int threadTotal = 200;

	public static void main(String[] args) throws InterruptedException {

		ExecutorService executorService = Executors.newCachedThreadPool();

		final Semaphore semaphore = new Semaphore(threadTotal);

		final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);

		for (int i = 0; i < clientTotal; i++) {

			executorService.execute(() -> {

				try {

					semaphore.acquire();
					test();
					semaphore.release();

				} catch (Exception e) {
					System.out.println(e);
				}

			});

		}

		countDownLatch.await();
		executorService.shutdown();
		System.out.println("count:" + isHappened.get());

	}

	private static void test() {
		if (isHappened.compareAndSet(false, true)) {
			System.out.println("execute");
		}
	}
}
